The correct option in A.
Lines 20-21 ("Nobody . . . died")
<h3>Briefing:</h3>
Nobody has succeed in this thing , and many have died.
This line belong to the 20-21 line for the phrase When fictional Swedish scientist went to the north pole for set up hydrogen- powered balloon.
<h3>Who is Swedish scientist ?</h3>
Only hydrogen offers helium-like lift; in fact, hydrogen offers 7-8% more lift than any other gas. In atmospheric sounding balloons outside of North America, hydrogen is frequently employed.
<h3>What is hydrogen- powered balloon?</h3>
Arrhenius, who was originally a physicist but is frequently referred to as a chemist, was one of the pioneers of the field of physical chemistry. He was the first Swedish Nobel laureate when he won the Chemistry Prize in 1903.
<h3>Why did they stop using hydrogen in balloons?</h3>
Despite being lighter than air, hydrogen is flammable, and since oxygen is present in the air, there is a chance of an explosion and fire. Since helium is a non-combustible gas and lighter than air, it is frequently used to fill balloons.
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If the length of the short leg is "a" then the length of the long leg should be "2a" and since the point is on the x axis the point is (2a,0) because the y=0
<h2>✒️ANSWER:</h2>
<u>When the intervals are in the form of (n, n+1), the value of greatest integer function is n, where n is an integer. For example, the greatest integer function of the interval [3,4) will be 3. The graph is not continuous. For instance, below is the graph of the function f(x) = ⌊ x ⌋.</u>
<h3>So its -2</h3>
(/^_^/)
Brainlilest me
Answer:
740
Step-by-step explanation:
The n th term of an arithmetic series is
= a₁ + (n - 1)d
where a₁ is the first term and d the common difference
Given a₃ = 7 and a₇ = (3 × 7) + 2 = 21 + 2 = 23 , then
a₁ + 2d = 7 → (1)
a₁ + 6d = 23 → (2)
Subtract (1) from (2) term by term
4d = 16 ( divide both sides by 4 )
d = 4
Substitute d = 4 into (1)
a₁ + 2(4) = 7
a₁ + 8 = 7 ( subtract 8 from both sides )
a₁ = - 1
The sum to n terms of an arithmetic series is
= 
[ 2a₁ + (n - 1)d ] , thus
= 
[ (2 × - 1) + (19 × 4) ]
= 10(- 2 + 76) = 10 × 74 = 740
